as in the above note, shorter videos, say, less than 1 hour playing time seem to export ok. this is just a time clip operation we are doing not a composition. but when we put videos longer than an hour and try to clip them to an hour, the export fails part way thru we can see the .progress property proceeding then we get the mysterious unknown error code: An unknown error occurred (-12551) as noted below in our console output apple any hints besides unknown? surely your code knows why it failed. why not tell us?! the "code = " listed below is the .status which shows as 4 waiting for trimmed movie file save 1 progress = 0.692948 2021-03-08 14:55:52.702278-0500 KargoCamera[1598:154227] Export failed: The operation could not be completed code = 4 2021-03-08 14:55:52.702412-0500 KargoCamera[1598:154227] Export recovidea: (null) 2021-03-08 14:55:52.702507-0500 KargoCamera[1598:154227] Export reason: An unknown error occurred (-12551)

sometimes, for the very same video file, we get an error from this call on iOS example of fail case path: /var/mobile/Media/DCIM/102APPLE/IMG_2685.mp4 sometimes it works fine. what? [[NSFileManager defaultManager] attributesOfItemAtPath:filepath error:&error]; anyone see this before?

Hey guys, tried to follow the super confusing doc on this, but no luck yet. https://developer.apple.com/av-foundation/Incorporating-HDR-video-with-Dolby-Vision-into-your-apps.pdf I have code that uses AVAssetReader and AVAssetReaderTrackOutput to directly pull frames from a video, but the colors are wrong for HDR dolby videos. Basically what I want is to extract frames from an HDR Dolby video as images and have those images not be the wrong color. Don't care if they are only 8 bit per color instead of 10 and all the all new stuff, just the closest that old fashioned 8 bit per color supports. I added the statement marked // added for dolby hdr per the above doc, (spread across several lines), no luck, still bad colors. Any hints of what I am missing? NSMutableDictionary* dictionary = [[NSMutableDictionary alloc] init];                                [dictionary setObject:[NSNumber numberWithInt:kCVPixelFormatType_32BGRA] forKey:(NSString*)kCVPixelBufferPixelFormatTypeKey];                // added for dolby hdr                dictionary[AVVideoColorPropertiesKey] = @{                 AVVideoColorPrimariesKey: AVVideoColorPrimaries_ITU_R_709_2,                 AVVideoTransferFunctionKey: AVVideoTransferFunction_ITU_R_709_2,                 AVVideoYCbCrMatrixKey: AVVideoYCbCrMatrix_ITU_R_709_2                 };                                AVAssetReaderTrackOutput* asset_reader_output = [[AVAssetReaderTrackOutput alloc] initWithTrack:video_track outputSettings:dictionary];                                  [asset_reader addOutput:asset_reader_output]; // from here we get sample buffers like this CMSampleBufferRef buffer2 = [asset_reader_output copyNextSampleBuffer]; // then pixel buffer  CVPixelBufferRef inputPixelBuffer = CMSampleBufferGetImageBuffer(buffer2); // then a CIImage   CIImage* ciImage = [CIImage imageWithCVPixelBuffer:inputPixelBuffer]; // one vid frame then we use standard stuff to convert that to a CGImage/UIImage

hello all, any idea if you can set the background color of one of these new SFSymbol images? i tried this paletteColors: method, it seems to take only the first color and use it as the foreground color   UIImageSymbolConfiguration * config =         [UIImageSymbolConfiguration configurationWithPaletteColors:@[[UIColor blueColor], [UIColor redColor]]];     UIImage * confMatImageSel = [UIImage systemImageNamed:@"square.grid.2x2"             withConfiguration:config];

anybody else noticing : unable to pair iphone ios16.x to mac via bluetooth?

hello apple guys, why do live photos lose their live-ness even when going thru proprietary iMessage? what is the best way transfer these live photos between users even for testing? i see the little icon indicating it is a live photo on the "sent" side of the message, but on the rec'vd side it shows as a regular photo.

anyone else notice this greek letter misspelled in the keycaps app? i thought i was spelling it wrong but maybe not?

anyone else notice this? last data seems to be from Sep 9 2023 status is green on the status page

Can anyone from apple provide the spline formulation that is used in the CIToneCurve filter?The documentation says that a spline is passed thru the points you give it, but thereare a lot of spline types in the world, and they all can yield different shapes thru the same set of points.

aside from the beta-test type of promo codes, is there any way to have "reduced price" promo codes that are used via the Redeem feature in the app store, for either full apps or in-app purchases (possibly subscriptions)?

Can anyone clarify which devices or chips the so-called "neural engine" can be used for machine learning model Training? As opposed to inference (or prediction)? And can external libraries such as Tensorflow (perhaps via the browser-based javascript library) access the neural engine in any manner for training or inference?

does anyone know if the mac app store ranking system has changed recently for mac apps? my mac apps have dropped like a proverbial rock in the ranking system near the end of last week. has any one done any experiments to see if mac app store rankings are higher if you recompile your apps for M1 apple silicon systems?

hi all, trying to create an imessage extension example based upon the Hello World story board that shows up when you create the extension. if i add a button to the hello world story board, and hook up the button to a method, i dont seem to be getting any tap events on that button. i tried also creating a button manually with [UIButton buttonWithType] and adding a target to it...the buttons show up, but they don't take tap events. i used the UI examiner in xcode, and touch events seem to be enabled on all views in the imsg extension view stack. i do see a strange message in the xcode console which i havent seen before: [PPT] Error creating the CFMessagePort needed to communicate with PPT. any ideas? PS: this is on simulator. i tried on device, same behavior. no touch events.

how is this secure? i have to switch icloud off and on for testing icloud in apps, and everytime i do this, it vacuums up all my photos and puts them on the cloud.

i pushed a couple of builds up to app store connect on dec5 and they just disappeared. not showing as in-process or anything. anyone else see this happening?